30819012613 has 4 divisors (see below), whose sum is σ = 30819519180. Its totient is φ = 30818506048.

The previous prime is 30819012583. The next prime is 30819012641. The reversal of 30819012613 is 31621091803.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14014297924 + 16804714689 = 118382^2 + 129633^2 .

It is a cyclic number.

It is not a de Polignac number, because 30819012613 - 2²⁵ = 30785458181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30819022613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147220 + ... + 288637.

It is an arithmetic number, because the mean of its divisors is an integer number (7704879795).

Almost surely, 2^30819012613 is an apocalyptic number.

It is an amenable number.

30819012613 is a deficient number, since it is larger than the sum of its proper divisors (506567).

30819012613 is an equidigital number, since it uses as much as digits as its factorization.

30819012613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506566.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 30819012613 in words is "thirty billion, eight hundred nineteen million, twelve thousand, six hundred thirteen".